class A {
    String name;
//   public A(){
//        System.out.println("一只"+name);
//    }
}
class Dog extends A{
    public Dog(){


        System.out.println();

    }
}
class Demo {
    public static void main(String[] args)  {
       Dog dog=new Dog();
    }

    private static class dog {
    }
}


